Bipolariton laser emission from a GaAs microcavity

Details Bipolariton laser emission from a GaAs microcavity Bipolariton laser emission from a GaAs microcavity

2005-09-02

arxiv.org/abs/cond-mat/0509068v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures, initial results on bipolaritons in microcavities

Scientific paper

Biexciton emission properties were studied in a single GaAs quantum well semiconductor planar microcavity by photoluminescence measurements at low temperatures. At high pump intensity a bipolariton emission appears close to the lower polariton mode. This new mode appears when we detune the cavity resonance out of the lower polariton branch, showing a laser like behavior. Very small lines widths were measured, lying below 110 μeV and 150 μeV for polariton and bipolariton emission respectively. The input/output power (I/O) measurements show that the bipolariton emission has a weaker coupling efficiency compared to previous results for polariton emission. Simultaneous photoluminescence and near field measurements show that the polariton and bipolariton emission are spectrally and spatially separated.

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